"The Geil Ultra DDR3 fared very well against the other kits of DDR3 memory that it was put up against, while also looking very well while it was doing it. With stock speeds of 1600MHz, the Geil Ultra features an XMP profile to allow the memory parameters to be set by just checking the XMP profile in your motherboard's BIOS. This, of course, is easier than setting the parameters manually, which some less avid overclockers will surely make use of. I was very impressed with the performance of the Geil Ultra modules even when they were underclocked to 1333MHz (DDR3 JEDEC spec) and the scores that these speeds were able to produce."